Moore-Garg HAL Friction Multiplier Calculator
Conditional force adjustment with caller independently verified friction coefficient; not a canonical Moore-Garg HAL friction formula or risk score.
Description
Multiply a measured baseline force by a caller-verified friction factor.
Scaling a measured force by a verified surface factor is a conditional arithmetic adjustment. Despite its name, this tool does not compute a Hand Activity Level or a Strain Index score.
When to use this tool
Multiply a measured baseline force by a caller-verified friction factor. Use it when the input measurements and conventions below match the operation you need.
- Prepare baselineForceN, callerVerifiedFrictionMultiplier, respecting the measurement basis and boundaries below.
- Compare the worked example with your intended operation before reusing its result.
How to use the tool and how it works
- Enter every field in the input table using the stated units and exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
The baseline force must be nonnegative and the caller-supplied friction multiplier positive. The adjusted force is their product, in the baseline force units.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| baselineForceN | Baseline force n. Newtons. | Finite number; zero or greater |
| callerVerifiedFrictionMultiplier | Caller verified friction multiplier. | Finite number; greater than zero |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.conditionalAdjustedForceN | Conditional adjusted force n; use the stated units and sign convention. |
{
"input": {
"baselineForceN": 10,
"callerVerifiedFrictionMultiplier": 1.5
},
"output": {
"result": {
"conditionalAdjustedForceN": 15
}
}
}Limitations and assumptions
- The multiplier is not measured or validated by the tool. Motion, contact geometry, repetition, posture and accepted occupational score tables are not modeled.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Use an assessment method and reference edition that match the task and population. This calculation or supplied record is one part of the evidence; it does not replace observation of the actual work. Compare the scope of the nearby tools below before substituting one.
References
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